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SY58020UMITR Datasheet

  • SY58020UMITR

  • 6GHz, 1:4 CML FANOUT BUFFER/TRANSLATOR WITH INTERNAL I/O TER...

  • 9頁

  • MICREL   MICREL

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Micrel
6GHz, 1:4 CML FANOUT
BUFFER/TRANSLATOR WITH
INTERNAL I/O TERMINATION
Precision Edge鈩?/div>
SY58020U
Precision Edge鈩?/div>
SY58020U
FEATURES
Precision 1:4, 400mV CML fanout buffer
Guaranteed AC performance over temperature/
voltage:
鈥?> 6GHz f
MAX
clock
鈥?< 60ps t
r
/ t
f
times
鈥?< 250ps t
pd
鈥?< 15ps max. skew
Low jitter performance:
鈥?< 10ps
(pk-pk)
total jitter (clock)
鈥?< 1ps
(rms)
random jitter (data)
鈥?< 10ps
(pk-pk)
deterministic jitter (data)
Accepts an input signal as low as 100mV
Unique input termination and V
T
pin accepts
DC-coupled and AC-coupled differential
inputs: LVPECL, LVDS, and CML
50
鈩?/div>
source terminated CML outputs
Power supply 2.5V
鹵
5% and 3.3V
鹵
10%
Industrial temperature range: 鈥?0
擄
C to +85
擄
C
Available in 16-pin (3mm
脳
3mm) MLF鈩?package
Precision Edge鈩?/div>
DESCRIPTION
The SY58020U is a 2.5V/3.3V precision, high-speed, fully
differential 1:4 CML fanout buffer. Optimized to provide four
identical output copies with less than 15ps of skew and less
than 10ps
(pk-pk)
total jitter, the SY58020U can process clock
signals as fast as 6GHz.
The differential input includes Micrel鈥檚 unique, 3-pin input
termination architecture interfaces to differential LVPECL,
LVDS, and CML signals (AC-coupled or DC-coupled) as
small as 100mV without any level-shifting or termination
resistor networks in the signal path. For AC-coupled input
interface applications, an on-board output reference voltage
(V
REF-AC
) is provided to bias the V
T
pin. The outputs are
optimized to drive 400mV typical swing into 50鈩?loads, with
extremely fast rise/fall times guaranteed to be less than
60ps.
The SY58020U operates from a 2.5V
鹵5%
supply or
3.3V
鹵10%
supply and is guaranteed over the full industrial
temperature range (鈥?0擄C to +85擄C). For applications that
require LVPECL outputs, consider the SY58021U or
SY58022U 1:4 fanout buffer with 800mV and 400mV output
swing, respectively. The SY58020U is part of Micrel鈥檚 high-
speed, Precision Edge鈩?product line. Data sheets and
support documentation can be found on Micrel鈥檚 web site at
www.micrel.com.
APPLICATIONS
s
All SONET and All GigE clock distribution
s
Fibre Channel clock and data distribution
s
Backplane distribution
s
Data distribution: OC-48, OC-48+FEC, XAUI
s
High-end, low skew, multiprocessor synchronous
clock distribution
FUNCTIONAL BLOCK DIAGRAM
IN
50鈩?/div>
V
T
50鈩?/div>
/IN
V
REF-AC
TYPICAL PERFORMANCE
Q0
/Q0
2GHz Output
Q1
Amplitude
/Q1
Q2
/Q2
Q3
/Q3
Precision Edge is a trademark of Micrel, Inc.
Micro
LeadFrame and MLF are trademarks of Amkor Technology, Inc.
(100mV/div.)
TIME (70ps/div.)
Rev.: A
Amendment: /0
1
Issue Date: July 2003

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